body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  background-color: #f5f5f5;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

h1, h2, h3 {
  color: #2c3e50;
}

button {
  cursor: pointer;
}

input, textarea, select {
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.success-message {
  color: #27ae60;
  padding: 10px;
  background-color: #e8f8f0;
  border-radius: 4px;
  margin: 10px 0;
}

error-message {
  color: #e74c3c;
  padding: 10px;
  background-color: #fdedee;
  border-radius: 4px;
  margin: 10px 0;
}